SVGA0515SH [VPT]
SPACE QUALIFIED POINT OF LOAD CONVERTERS;型号: | SVGA0515SH |
厂家: | VPT, Inc. |
描述: | SPACE QUALIFIED POINT OF LOAD CONVERTERS |
文件: | 总11页 (文件大小:778K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SVGA0515S SERIES
SPACE QUALIFIED POINT OF LOAD CONVERTERS
Models Available
Input: 5 V nominal
50 W, 15 A output
Qualified to MIL-PRF-38534 Class H and Class K
SVGA Series DC-DC Converter
1.0 DESCRIPTION
1.2 SPACE LEVEL CHARACTERIZATIONS
The SVGA Series of space qualified point of load DC-DC
converters is specifically designed for the harsh radiation
environment of space applications. Performance is guaranteed
through the use of hardened semiconductor components,
radiation lot acceptance testing (RLAT) of non-hardened
components, and analysis. The SVGA Series has been
characterized for Total Ionizing Dose (TID) performance
including Enhanced Low Dose Rate Sensitivity (ELDRS) and for
Single Event Effects (SEE) according to VPT’s DLA-approved
Radiation Hardness Assurance (RHA) plan per MIL-PRF-38534,
Appendix G, Level P. Characterization is performed at both the
component level and at the SVGA Series hybrid converter level.
• Guaranteed TID performance to 100 krad(Si) including ELDRS
• SEE performance to 85 MeV-cm2/mg. Transients are fully
characterized for cross section and magnitude
• Worst-case analysis, stress, radiation, reliability reports available
1.3 MANUFACTURING AND COMPLIANCE
• Qualified to MIL-PRF-38534 Class H and Class K,
DLA SMD # 5962-12219
• MIL-PRF-38534 element evaluated components
• Manufactured in a MIL-PRF-38534 Class H and Class K facility
• MIL-STD-883
• ISO-9001
The SVGA Series of point of load DC-DC converters is radiation
tolerant and suited for use in low Earth orbit (LEO), medium
Earth orbit (MEO), geostationary orbit (GEO), deep space, and
launch vehicle programs.
1.4 PACKAGING
• Low-profile: 1.075” x 1.075” x 0.270”
• Max weight: 16 g
• Precision projection-welded hermetic metal case
1.1 FEATURES
1.5 SIMILAR PRODUCTS AND ACCESSORIES
• Operates from 5 V input
• Adjustable Output from 0.8 V to 3.4 V
• Up to 15 Amps or 50 Watt Output
• High Efficiency, up to 94%
• High Power Density, >160 W/in3
• Output Inhibit Control
• SVGA0510S 33 W space qualified point of load DC-DC converter
• SVRGA0508S 20 W space qualified point of load DC-DC converter
• Custom versions available
• Space qualified isolated DC-DC converters, 15 - 100 W
• EMI filters
• Low Output Noise
• No Use of Optoisolators
• Short Circuit Protection
Products and reports described in this datasheet are subject to all export license restrictions and regulations which may include but are not limited to ITAR
(International Traffic in Arms Regulations) and the Export Administration and Foreign Assets Control Regulations. Further restrictions may apply. Contact VPT
sales for details.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVGA0515S - 4.0
Page 1
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SVGA0515S Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
+VIN
Q2
COM
+VOUT
COM
Q1
UNDER
VOLTAGE
SHUTDOWN
PWM
CONTROL
FEEDBACK
COMPENSATION
+SENSE
NETWORK
INH
TRIM
2.2 CONNECTION DIAGRAM
1
4
8
5
+VIN
N/C
+VOUT
+SENSE
+
+VIN
100uF
LOAD
-
3
2
6
7
INH
TRIM
COM
R
COM
3.0 SPECIFICATIONS
3.1 ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Input Voltage (Continuous):
-0.3 V to 7 V
Operating Temperature (Full Load):
Storage Temperature:
-55 °C to +125 °C
-65 °C to +150 °C
270 °C
Input Voltage (Transient, 1 second):
ESD Rating per MIL-PRF-38534:
-0.3 V to 7.5 V
3B
Lead Solder Temperature (10 seconds):
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SVGA0515S - 4.0
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SVGA0515S Series
1
3.2 PERFORMANCE SPECIFICATIONS
Tcase = -55 °C to +125 °C, Vin = +5 V ± 1%, Full Load, Unless Otherwise Specified
SVGA0515S
Parameter
Conditions
Min
Typ
Max
Units
INPUT
4
Vout = 0.8 V to 2.5 V
Vout = 2.6 V to 3.3 V
INH < 1.5 V
3.5
-
7.0
7.0
35
220
-
V
Voltage
4.2
-
V
Current
-
-
-
-
30
140
3.0
2.7
mA
mA
V
No Load
4,5
Turn-On
Undervoltage Lockout
Turn-Off
-
V
OUTPUT STATIC
Voltage
Tcase = 25 °C
-1.0
-1.5
0
-
-
-
+1.0
+1.5
50
%Vout
%Vout
W
Tcase = -55 °C to +125 °C
2
Power
Current
0
-
-
15
180
35
5
A
Ripple Voltage
Load Regulation
20 Hz to 10 MHz
No Load to Full Load
Vout = 3.3 V
100
20
mVpp
mV
W
-
Load Fault Power Dissipation
OUTPUT DYNAMIC
-
2.5
Load Step, Half to Full Load, Vout = 3.3 V
Output Transient
-
-
-
-
100
20
5
200
60
mV
µs
3
Recovery
Turn-On, Vin = 0 to 5 V
Delay
10
ms
Overshoot
3
15
mVpk
FUNCTION
4
Output Inhibited
Output Enabled
0
-
-
1.5
Vin
V
V
INH Pin Input
4
4.7
INH Pin Open Circuit Voltage
GENERAL
Efficiency
Vout = 3.3 V
87
-
91
-
-
%
4
5000
µF
Capacitive Load
Switching Frequency
Weight
200
250
-
315
16
-
kHz
g
Standard package option
SF @ Tcase = 55 °C
-
-
MTBF (MIL-HDBK-217F)
6.82
MHr
6
POST-RAD END-OF-LIFE LIMITS
OUTPUT Voltage
Tcase = -55 °C to +125 °C
-3.0
190
185
-
-
-
+3.0
325
350
%Vout
kHz
Switching Frequency
Tcase = -55 °C to +125 °C, Vin = 5 V
Tcase = -55 °C to +125 °C, Vin = 3.6 V – 7 V
kHz
1. Performance specifications are met with 100 µF from VIN to COM
2. Dependent on output voltage
3. Time for output voltage to settle within 1% of steady-state value
4. Verified by qualification testing
5. Output voltage not necessarily in regulation
6. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted
Sales Information
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SVGA0515S - 4.0
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SVGA0515S Series
4.0 PERFORMANCE CURVES
4.1.1 SVGA0515S Efficiency (Typical, 25 °C)
4.1.2 SVGA0515S Efficiency (Typical, 25 °C)
95
93
91
89
87
85
83
93
91
89
87
Output Voltage:
3.3 V
Output Voltage:
2.5 V
85
0
5
10
15
15
15
0
5
10
15
Output Current (A)
Output Current (A)
4.1.3 SVGA0515S Efficiency (Typical, 25 °C)
4.1.4 SVGA0515S Efficiency (Typical, 25 °C)
90
86
88
86
84
82
84
82
80
78
Output Voltage:
1.5 V
Output Voltage:
1.0 V
80
76
0
5
10
0
5
10
15
Output Current (A)
Output Current (A)
4.1.5 SVGA0515S Efficiency (Typical, 25 °C)
83
81
79
77
75
Output Voltage:
0.8 V
73
0
5
10
Output Current (A)
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SVGA0515S - 4.0
Page 4
SVGA0515S Series
5.0 MECHANICAL OUTLINES AND PINOUT
Standard Package Option:
1. Tolerances are +0.005” unless otherwise stated
2. Case temperature is measured on the center of the baseplate surface
3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)
Pin Function
Pin Function
Pin Function
1
2
3
+VIN
COM
INH
4
5
6
N/C
7
8
9
COM
+SENSE
TRIM
+VOUT
CASE
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SVGA0515S Series
6.0 TECHNICAL NOTES
Please note that many of these functions are also demonstrated in detail on the VPT website in the
form of technical video labs.
6.1 GENERAL INFORMATION
6.1.1 Topology Description
The SVGA0515S Series is a non-isolated, fixed-frequency, radiation-hardened, synchronous buck converter. It operates from a 5 V
input and provides a stepped-down, precisely regulated, programmable output voltage at very-high efficiency. The SVGA0515S is
optimized for low voltage point of load applications.
6.1.2 External Components
The SVGA0515S Series has internal input and output capacitors. For best performance under transient conditions, a minimum
additional 100 µF tantalum input decoupling capacitor is recommended. The SVGA0515S is stable with no load capacitance. Additional
output capacitance is allowed up to the maximum listed in Section 3.2.
6.1.3 Source Impedance
The impedance of the 5 V input source can interact with the point of load converter and can affect performance. High source
impedance is often caused by a long input cable or other components added in series with the input. In some cases, additional input
capacitance will be needed to stabilize the system.
6.2 FUNCTION DESCRIPTIONS
1
+VIN
6.2.1 On/Off Control (Inhibit)
The INH (Inhibit) pin is a control pin referenced to COM. The INH pin must be driven
using an open-collector or open-drain configuration. Pulling the INH pin low disables
the converter output. Leaving INH open enables the output, allowing the converter to
47K
3
INH
operate normally. The pin must be pulled below 1.5 V to disable the output. An
OPTIONAL
CAPACITOR
optional capacitor from INH to COM may be used to delay turn-on. The INH pin should
be left open if not used.
2
COM
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SVGA0515S Series
6.2.2 Adjusting the Output Voltage (TRIM)
The output voltage of the converter is set with an external resistor connected from the TRIM pin to the COM pin. This resistor must
have a tolerance of 1% or better to achieve an accurate output voltage. The default output voltage with the TRIM pin left open is 0.8 V.
+VOUT
SVGA0515S
+Vout (V)
Rtrim (Ω)
None
205k
100
30K
0.8
+SENSE
TRIM
0.9
1.0
99.9k
47.4k
24.9k
15.9k
13.9k
12.4k
7.25k
5.4k
1.2
1.5
-
1.8
5.1K
+
1.9
2.0
2.5
R-TRIM
210K
+
0.7 V
2.8
-
3.0
4.44k
3.30k
2.98k
COM
3.3
3.4
6.3 PROTECTION FEATURES
6.3.1 Input Undervoltage Lockout
The SVGA0515S Series provides input undervoltage lockout protection. For input voltages below the turn-on voltage, the converter will
remain off. When the input voltage exceeds the turn-on voltage, the converter will start. For input voltages below the operating range of
the converter but above the UVLO turn-off voltage, the converter may reach its maximum duty cycle and the output may drop out of
regulation.
6.3.2 Output Soft-Start
The SVGA0515S Series utilizes an output soft-start function to ramp the output in a controlled manner, eliminating output voltage
overshoot and limiting inrush current at turn on. A voltage mode soft-start ensures the output waveform remains consistent regardless
of changes in the load current. The output rise time is approximately 3 ms. The soft-start function is active whether the module is
turned on with an application of input voltage or from release of the INH pin. The turn-on delay time is specified from the application of
input voltage (or release of INH pin) until the output reaches 90% of its final value.
6.3.3 Output Short Circuit Protection
The SVGA0515S Series provides output short circuit protection. When a sustained high peak current is detected, the converter will shut
down and enter a hiccup mode. After a delay, the converter will attempt a soft-start. This sequence will continue until the fault is
removed, allowing the converter to soft-start and resume normal operation.
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SVGA0515S Series
6.4 THERMAL CONSIDERATIONS
The SVGA0515S is rated for full power operation at 125 °C. Operation above 125 °C is allowed at reduced power. Specifically, the
output power should be derated linearly from full power at 125 °C to half power at 130 °C and to zero power at 135 °C. The operating
temperature of the converter is specified on the baseplate of the converter. The converter is designed to be conduction-cooled, with the
baseplate mounted to a heat sink, chassis, PCB or other thermal surface. The internal power dissipating components are mounted to
the baseplate of the converter and all heat flow is through the baseplate. The lid of the converter does not provide a good thermal path.
The hybrid DC-DC converter contains many semiconductor components. The maximum temperature rise from junction to case is 11 °C
at full load.
6.5 VPT RHA PLAN AND APPROACH
VPT takes a conservative approach to radiation testing to ensure product performance during space travel. VPT’s DLA approved
Radiation Hardness Assurance (RHA) plan documents VPT’s processes and procedures for guaranteeing the performance of VPT
products under various environmental conditions in space, including TID, SEE, and ELDRS.
Documents Available
Details
The radiation environments covered by this overview include: total ionizing dose (TID), which
includes enhanced low dose rate sensitivity (ELDRS); displacement damage (DD); and single
event effects (SEE).
DLA approved Radiation Hardness Assurance (RHA) Plan Summary
Worst-Case Analysis Report
Stress Report
Detailed worst-case analysis guarantees circuit performance post radiation and end of life.
Individual component stress analysis and deratings are included as part of the WCA report.
An overview report on the component level RLAT and characterization testing for TID and DD
as well as the hybrid level characterizations for TID and SEE response.
Radiation Test Summary Report
Reliability Report
MTBF report based on MIL-HDBK-217 reliability calculations.
Component temperature rise analysis and measurement results.
Thermal Analysis Report
Test Definition
VPT’s Approach
Total Ionizing Dose (TID). A measure of the energy absorbed in the
semiconductor components from the naturally occurring sources of
radiation (protons, electrons, photons). This results in the slow
degradation of semiconductor performance specifications. TID is tested
by exposing components to gamma radiation from a Cobalt-60 source.
SVGA Series: Designed for 100 krad(Si). Sensitive semiconductor components undergo
RLAT to 100 krad(Si) per MIL-STD-883 Method 1019. Converters are characterized to
100 krad(Si).
Enhanced Low Dose Rate Sensitivity (ELDRS): Many linear-bipolar
integrated circuits show enhanced parameter degradation when exposed
at low dose rates close to those seen in a space environment as
compared to the high dose rates (50-300 rad(Si)/s) that components were
traditionally tested at for TID degradation. MIL-STD-883 Method 1019
gives guidance for characterizing components for ELDRS. Components
that exhibit ELDRS are tested for TID at a rate below 0.01 rad(Si)/s.
SVGA Series: All bipolar linear ICs are characterized for ELDRS sensitivity and tested in
accordance with MIL-STD-883 test method 1019 section 3.13
Single Event Effects (SEE). Single high energy protons and heavy ions
can deposit sufficient energy in a semiconductor component, causing a
range of effects. SEEs include single event latchups (SELs), single event
gate ruptures (SEGRs), single event transients (SETs), single event
functional interrupts (SEFIs) and single event burnouts (SEBs).
SVGA Series: Converters are characterized for catastrophic events (SEL, SEB, SEGR) as
well as functional interrupts (SEFI) under heavy ion exposure to LET = 85 MeV-cm2/mg.
Converters are also characterized for cross section and magnitude of output transients (SET)
for at least 3 different LET levels.
Radiation Lot Acceptance Testing (RLAT): Semiconductor wafer lots are
exposed to TID on a sample basis. If the parameter degradation for the
tested samples is within the predetermined acceptance limits, then the lot
can be used in radiation hardened converters.
SVGA Series: Sensitive semiconductor components undergo RLAT for TID.
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SVGA0515S Series
7.0 ENVIRONMENTAL SCREENING
100% tested per MIL-STD-883 as referenced to MIL-PRF-38534.
Contact sales for more information concerning additional environmental screening and testing options. VPT Inc. reserves the right to
ship higher screened or SMD products to meet orders for lower screening levels at our sole discretion unless specifically forbidden by
customer contract.
/EM
/H+
/K
(Engineering Model)
Non-QML1,6
MIL-STD-883 Test
Method, Condition
Test
(Class H + PIND)
(Class K)
Non-Destructive
Bond Pull
2
2
TM2023
●
●
●
●
●
TM2010, TM2017, TM2032
(MIL-STD-750, TM2072,
TM2073)
Internal Visual
●
●
TM1010, Condition C
-65 °C to 150 °C, Ambient
Temperature
Cycling
●
●
Constant
Acceleration
TM2001, 3000g, Y1
Direction
●
●
●
3
2
TM2020, Condition A
25 °C
PIND
●
Pre Burn-In
Electrical
TM1015, 320 hrs.,
125 °C, Case Typ
●
TM1015, 160 hrs.,
125 °C, Case Typ
Burn-In
●
●
24 hrs., 125 °C, Case Typ
●
●
MIL-PRF-38534, Group A
Subgroups 1-6
●
4
-55 °C, 25 °C, 125 °C
Final Electrical
MIL-PRF-38534, Group A
Subgroups 1 and 4
25 °C
TM1014, Fine Leak,
Condition A2 or B1
●
●
●
●
Hermeticity
(Seal)
TM1014, Gross Leak,
Condition C or B2
Gross Leak, Dip (1x10-3)
●
●
5
TM2012
●
●
Radiography
External Visual
TM2009
●
1. Non-QML products may not meet all requirements of MIL-PRF-38534
2. Not required per MIL-PRF-38534. Test performed for additional product quality
assurance
4. 100% R&R testing with all test data included in product shipment
5. Radiographic test Certificate of Compliance and film(s) or data CD included in
product shipment
3. PIND test Certificate of Compliance included in product shipment
6. Engineering models utilize only the screening specified and are not considered
compliant for flight use
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SVGA0515S Series
8.0 STANDARD MICROCIRCUIT DRAWING (SMD) NUMBERS
Standard Microcircuit SVGA0515S Series
Drawing Number Similar Part Number
5962R1221902HXC
5962R1221902HXA
5962R1221902KXC
5962R1221902KXA
SVGA0515S/H+
SVGA0515S/H+-E
SVGA0515S/K
SVGA0515S/K-E
Do not use the SVGA0515S Series similar part number for SMD product acquisition. It is listed for reference only. For exact
specifications for the SMD product, refer to the SMD drawing. SMDs can be downloaded from the DLA Land and Maritime (Previously
known as DSCC) website at http://www.dscc.dla.mil/programs/smcr/. The SMD number listed above represents the Federal Stock
Class, Device Type, Device Class Designator, Case Outline, Lead Finish and RHA Designator (where applicable). Please reference the
SMD for other screening levels, lead finishes, and radiation levels. All SMD products are marked with a “Q” on the cover as specified by
the QML certification mark requirement of MIL-PRF-38534.
9.0 ORDERING INFORMATION
SVGA
05
15
S
/K
-
XXX
1
2
3
4
5
6
(1)
Product
Series
(2)
(3)
(4)
(5)
(6)
Nominal Input
Voltage
Output Current
Number of
Outputs
Screening Code1,2,3
Additional
Screening
Code
SVGA
05 5 Volts
15 15 Amps
S
Single
/EM Engineering Model
/H+ Class H + PIND
/K Class K
Contact Sales
1
2
Contact the VPT Sales Department for availability of Class H (/H) or Class K (/K) qualified products
VPT Inc. reserves the right to ship higher screened or SMD products to meet lower screened orders at our sole discretion unless specifically forbidden by customer
contract
3
Engineering models utilize only the standard screening specified and are not considered compliant for flight use. These models are intended for low volume engineering
characterization only and have no guarantee regarding operation in a radiation environment. The customer must place the following statement on each line item of their
purchase order(s) for /EM units when ordering engineering models:
“(Customer Name) acknowledges that the /EM unit listed in this line item is not permitted for flight use and will be used for Engineering characterization only.”
Please contact your sales representative or the VPT Inc. Sales Department for more information concerning additional environmental
screening and testing, different input voltage, output voltage, power requirements, source inspection, and/or special element evaluation
for space or other higher quality applications.
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SVGA0515S Series
10.0 CONTACT INFORMATION
To request a quotation or place orders please contact your sales representative or the VPT, Inc. Sales Department at:
Phone:
Fax:
(425) 353-3010
(425) 353-4030
E-mail:
vptsales@vptpower.com
All information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible errors or
omissions. The products or specifications contained herein are subject to change without notice.
11.0 ADDITIONAL INFORMATION
Visit the VPT website for additional technical resources, including:
Product Catalogs
Application Notes and White Papers
Technical Video Labs
Additional Products For Avionics/Military,
Hi-Rel COTS, and Space Applications
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